The Boiling Point of Pure Benzene (C₆H₆) Is 80

question 47

Multiple Choice

The boiling point of pure benzene (C₆H₆) is 80.10 ° C. A solution of 7.39 g of a solid dissolved in 85.0 g of benzene boils at 82.49 ° C. If k_b for benzene is 2.53 ° C/molal, the molar mass of the solid is:

• A) 662 g/mol
• B) 38.0 g/mol
• C) 92.0 g/mol
• D) 628 g/mol
• E) 7.39 g/mol

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